Computer monitor



FIG. 1 is a front perspective view of a computer monitor showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear perspective view thereof.

The evenly-spaced dashed broken lines in the figures depict portions of the computer monitor that form no part of the claimed design. 

CLAIM The ornamental design for a computer monitor, as shown and described. 